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Commit 6d7581e6 authored by Jiri Pirko's avatar Jiri Pirko Committed by David S. Miller
Browse files

list: introduce list_first_entry_or_null 



non-rcu variant of list_first_or_null_rcu

Signed-off-by: default avatarJiri Pirko <jiri@resnulli.us>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e4e8536f

include/linux/list.h

+11 −0
Original line number Diff line number Diff line
@@ -361,6 +361,17 @@ static inline void list_splice_tail_init(struct list_head *list, 
#define list_first_entry(ptr, type, member) \

	list_entry((ptr)->next, type, member)



/**

 * list_first_entry_or_null - get the first element from a list

 * @ptr:	the list head to take the element from.

 * @type:	the type of the struct this is embedded in.

 * @member:	the name of the list_struct within the struct.

 *

 * Note that if the list is empty, it returns NULL.

 */

#define list_first_entry_or_null(ptr, type, member) \

	(!list_empty(ptr) ? list_first_entry(ptr, type, member) : NULL)



/**

 * list_for_each	-	iterate over a list

 * @pos:	the &struct list_head to use as a loop cursor.